Amex Platinum also silently lost the Platinum Dining benefit which brought garanteed amenities (such as a free sude dish or drink, or an upgraded table) at partner restaurants when booked through the concierge (sometimes just flashing the Plat card was sufficient)

Now they silently eliminated this benefit and replaced it with "Global Dining Collection" smoke&mirror which has fewer partner restaurants and doesn't spell out which amenities one is entitled to.